my $main_image = $pdf->main_image_params(); 
    is_deeply($pdf->adjust_to_bounding_box($main_image),  
              undef, 
              "adjust_to_bounding_box returns on no second param" 
             ); # test

##</code><code>##

#     Failed test <path to unit_tests.pl> at line 1131) 
#          got: undef 
#     expected: 'adjust_to_bounding_box returns on no second param'

##</code><code>##

    my $main_image = $pdf->main_image_params(); 
    my $got = $pdf->adjust_to_bounding_box($main_image);
    is_deeply($got,  
              undef, 
              "adjust_to_bounding_box returns on no second param" 
             ); # test